Watchmaker&#39;s device.



PATENTED APR. 11, 1905.

W. D. SMITH.

WATGHMAKERS DEVICE.

APPLICATION FILED JUNE 9,1904;

INVEN'TGR.

WITH ESSES) Patented April 11, 1905.

PATENT OFFTcE.

WlLLlAM D. SMlTH, OF DENVER, COLORADO.

WATCHMAKERS DEVICE.

SPECIFICATION forming part of Letters Patent No. 787,313, dated April 11, 1905.

Application filed June 9,1904. Serial No. 211.791.

lle it known that l, \VILLIAM' D. SMITH, of llenver, l enver county, ("olorad0, have invented a new and useful \Vatchmakefs l)evice, of which the following is a full. clear, and exact description, reference being had to the accomramying drawings, forming part of this specification, in which Figure l is aside elevation ofmy improved apparatus for staking the roller-table and hairspring on the balance-staff of a watch. Fig. 2 is an enlarged sectional side elevation showing the balance-wheel in place. Fig. 3 is a plan view showing the method of puttingthe hair-spring on beat. Fig. l is a cross-section of Fig. 2. Fig. 5 is a top plan view of the stump. Fig. 6 is a sectional side elevation of the stump: and Fig. 7 is a sectional side elevation of the hollow adjusting-punch, showing also a plan view of its lower end.

.\ly invention relates to apparatus for staking the roller-table and hair-spring on the balance-staff of a watch and putting it on beat.

The object of the invention is to provide a simple and accurate device which will not only indicate the exact position of the hair-spring stud, but also put the timepiece on beat.

lt is further designed to provide a device of this character which may be used on any make or size of watch or any timepiece which employs a halance-whecl and hair-spring.

ln the drawings, 2 represents a base or stand, having a pin 3 and two holes 4: 4.

5 indicates a U-shaped frame having a vertical hole in its lower leg which lits on a pin 3, and b is a stump arranged to fit in the vertical hole in the lower leg of the frame This stump has a hole 7 at its lower end and a slot H at the side of its upper end. lts lower end portion is secured to a lower pointer 9, which is rigidly attached to the stump and turns with it. A spiral spring 10 surrounds the stump between the pointer-collar and the lower leg of the frame. This spring acts as a frictional brake to hold the pointer-9 in any adjusted position. The portion of the stump with a vertically-extcnding bearing 12, having a through-hole in line with the stump and arranged to receive the hollow driving-punch 13, having a round hole in its lower end and litting within the frame-bearing. \Vhen the stump is inserted in the frame, the spiral spring draws it down against its collar 1% below the pointer ll.

To stake the roller-table and hair-spring on the balance-staff, so that they will be in a proper position to have the watch on beat, the frame is taken from the standard and the lower end of the stump placed on the cap-jewel in the cock-bridge of the balance-wheel 16. The lower pointer is turned so that it is directly above the lever-pivot, and the upper pointer, which moves independently of the lower one, is turned until it is directly over the hail-spring stud 17. \Vhen the end of the stump is placed on the cap-jewel in the cockbridge, the spring ll) gives a yielding pres sure and allows the stump to yield to prevent too greata pressure being put upon the bridge. The spring also acts as a yielding binder to hold the stump with the pointer in the position to which it is turned. The tool is then replaced on the stand, the roller-table '18 is placed loosely on the staff 15), which is then placed in the tool, the lower part of the staff enteringthe hole in the lower leg of the frame, while the roller-jewel lllenters tl :slotS. The hair-spring 21 is then placed on the staff with the stud directly over the upper pointer. The driving-punch [3 is then inserted in the tool and thehair-spring and roller-table are forced into place and will be in the proper position for putting the watch in perfect beat.

If in forcing the hair-spring and the rollertable to place the hair-spring stud should not come to place directly over the upper pointer, the punch 22 of Fig. 7 is inserted in the tool, with its tooth 23 entering splitQT in the collar of the hair-spring. It is then turned until the stud is directly over the upper pointer.

ln taking up or letting out a hair-spring to change the rate of the watch after the hairspring has been repinned to the stud the balance is placed in the tool, as before, and the spring is turned by the toothed punch 22 until the hair-spring stud is directly over the upper cylinder or very large arbor.

pointer and the watch is on beat, the position of l the two pointers being previously determined, as before. To ascertain if a lever-watch is on beat,the pointer is set as before, and the balance is placed in the tool, and if the hair-spring stud is not directly over the upper pointer the watch is not on beat and can be at once corrected by inserting the adjustment-punch 22 and turning the hair spring until its stud comes over the upper pointer. The above applies to any lever-watch, and thesame tool is applicable to watches of different constructionsuch as duplex, chronometer, cylinderescapement, &c.the lower pointer being placed so as to denote the center of escapement and the upper pointer denoting the place of fastening the outer coil of the hair-spring.

To adapt the apparatus to a cylinder-watch, or one having a very thick staff, the stump 6 is made with a removable center piece 25 and a hole 7, adapted to receive the long punch end 26 of the adjusting-punch to push it out. The hole is thus enlarged to accommodate a The advantages of my invention will be apparent to those skilled in the art. The device is simple, easily applied and operated, and gives a mechanically correct result in setting. It is applicable to all kinds and sizes of Watches and will give accurate results in each. In former devices of this character complicated indexes were used to show the positions for watches of different makes. Moreover, they only located the position and did not apply the parts, so that if in applying the spring was not pushed on correctly there was no way of altering it. Some of these devices employa book showing locations. Many workmen in carrying out this operation make a mark on the balance-wheel with a sharp instrument; but the wheel is thus gotten out of poise and the accuracy of the watch is destroyed. My tool obviates all these difficulties and makes the operation a simple and easy one, which a novice can understand.

The frame of the tool and the stump with the upper pointer might be rigid with the frame and the lower pointer movable. The spring on the stump may be done away with; but I prefer to use it, as with a yielding resistance there is less liability of pressing too hard on the balance-wheel in setting the tool on the cock-bridge of the balance-wheel. The

spring also acts as a binder for the stump with the attached arm and holds it in place while allowing it to act as a spring-centering tool.

Many other variations may be made in the form and arrangement of the device Without departing from my invention.

I claim 1. In a device for staking the roller-table and hair-spring on a balance-staff, a stump having two pointers, one adjustable relative to the other, and arranged to indicate the correct relative position of the hair-spring stud; substantially as described.

2. In a device for staking the roller-table and hair-spring on a balance-stafi, a frame, a stump removable therefrom, and having two pointers, one adjustable relative to the other, and a punch arranged to fit in the frame and force the hair-spring and roller-table to' place; substantially as described.

3. In a device for staking the roller-table and hair-spring on a balance-staff, a punch for forcing the hair-spring and roller-table to place, and two pointers, one adjustable relative to the other and arranged to indicate the proper position of the hair-spring stud; substantially as described.

4. In a device for staking the roller-table and hair-spring on a balance-staff, a stump having two pointers adjustable relative to each other, and a toothed punch arranged to turn the spring until the stud is over one of the pointers; substantially as described.

5. In a device for staking the roller-table and hair-spring on a balance-staff. a holder for the parts, means for forcing the spring and roller-table to place, and an adjustable pointer arranged to indicate the point of attachment of the hair-spring; substantially as described.

6. A Watchmakers indicator arranged to fit over the cock-bridge of the balance-wheel, and having one or more adjustable arms to determine whether a Watch is on beat; substantially as described.

7. In a device for staking the roller-table and hair-spring on a balance-staff, a removable frame arranged to set over the cock-bridge of the balance-wheel and having one or more pointers, and a stand arranged to receive the frame when the pointer is adjusted, and a tool arranged to force the hair-spring and rollertable to place; substantially as described.

In testimony whereof I have hereunto set my hand.

l/VILLIAM D. SMITH. WVitnesses:

LIZZIE M. SEoHRIs'r, HENRY MILLER. 

